linux-kernel - Re: [PATCH v1 1/3] scsi: ufs: Let UPIU completion trace print RSP UPIU

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Message-ID: <628c0050-e3e2-033c-8a25-6fc04d4d5657@acm.org>
Date:   Sun, 23 May 2021 18:24:15 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Bean Huo <huobean@...il.com>, alim.akhtar@...sung.com,
        avri.altman@....com, asutoshd@...eaurora.org, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, stanley.chu@...iatek.com,
        beanhuo@...ron.com, tomas.winkler@...el.com, cang@...eaurora.org
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/3] scsi: ufs: Let UPIU completion trace print RSP
 UPIU

On 5/23/21 2:14 PM, Bean Huo wrote:
> +		rq_rsp = (struct utp_upiu_req *)hba->lrb[tag].ucd_rsp_ptr;

So a pointer to a response (hba->lrb[tag].ucd_rsp_ptr) is cast to a
pointer to a request (struct utp_upiu_req *)? That seems really odd to
me. Please explain.

Bart.